Pension Plan and Employee Benefits - Schedule of Current and Non-Current Portions of the Other Benefits Liability (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Current	$ 25,685	$ 25,685
Non-current	91,752	91,638
Current	35,520	35,520
Non-current	196,009	196,321
CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Current	25,685	25,685
Non-current	91,752	91,638
Current	30,777	30,777
Non-current	132,169	132,321
Other Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Current	5,241	5,241
Non-current	41,665	41,815
Other Benefits Plan | CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Current	4,479	4,479
Non-current	$ 32,110	$ 32,289